//二级下拉菜单获取	
function secondSelect(actionname,param) {
		$.ajax({
			url : actionname+'.action' + '?param='
					+ param,
			method : 'post',
			dataType : 'json',
			success : function(data) {
				var optionString = "";
				for ( var key in data) {
					$("#secondSelect").empty();
					var value = key;
					var name = data[value];
					optionString += "<option value='" + value + "'>" + name
							+ "</option>";
					$(optionString).appendTo($("#secondSelect"));
				}
				;
			},
			error : function() {
				alert("信息获取错误");
			}
		});
	}